BasicMetadata: use full namespace for Location vocab
BasicMetadata: use full namespace for Location vocab

If the application has independently defined a ControlledVocabulary module, this will cause an error:

```
NameError (uninitialized constant ControlledVocabularies::Location):

/Users/alex/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/bundler/gems/hyrax-a8873d1c3647/app/models/concerns/hyrax/basic_metadata.rb:29:in
`block in <module:BasicMetadata>'
```

samvera/hyrax,samvera/hyrax,samvera/hyrax,samvera/hyrax